Chronometer electric call



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W. L. BAILIE 82 G. H. MILLS.

GHRQNOMETER ELECTRIC CALL.

No. 344,072. Patented June 22, 1886.

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(No Model.) 2 Sheets-Sheet 2.

W; L. BAILIB 8v G. H. MILLS. GHBONOMBT'ER ELECTRIC CALL.

No. 344,072. Patented June 22,1886.

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UNITED STATES WILLIAM L. BAILIE AND GEORGE H.

PATENT OFFICE.

MILLS, OF BALTIloIORE, MARYLAND.

SPECIFICATION forming part of Letters Patent No. 344,072, dated June 22,1886.

Application filed March 12, 1886.

T0 at whom, it may concern:

Be it known that we, WILLIAM L. BAILIE and GEORGE H. MILLs, citizens ofthe United States, residing at Baltimore, in the State of Maryland, haveinvented certain new and useful Improvements in Ghronometer ElectricCalls, of which the following is a specification, reference being hadtherein to the accompanying drawings.

Our invention relates to improvements in electro calls governed by achronometer, in which the electrodes of the circuit are connected at aprearranged time automatically, thereby closing the circuit and ringingthe electro-bell in the same, as illustrated in the accompanyingdrawings, in which- Figure 1 is a sectional view of the plug and switchboards with the chronometer shown in full side elevation; Fig. 2, afront view of the chronometer, switch board, plug retaining board, andthe general arrangement of the bells, wire, &c.; Fig. 3, detail views ofthe switch-plugs; Fig. 4, a detail View of the universal pawl-pins andthe arm which communicates with the arbor. Fig. 5 is a front View of thechronometer and switch-board, with a portion of the chronometer removed,showing the arm constructed without the pawl. Fig. 6 is a sectional viewthrough the switch-board, showing the bent form of the arm when no pawlis provided, with the chronometer shown in full plan. Fig. 7 is asection through a portion of the switch-board and one switchplate,showing the curved form of the surface of the switch-plate.

Similarletters refer to similar parts through the several views.

The letter A designates the chronometer, which may be constructed on anyof the wellknown principles, with its casing formed circular or octagon,as shown, by which the 0011- necting-plates a can be placed entirelyaround the same.

Concentric to and in the rear of the chro nometer A is arranged theswitch board 13, whose diameter is greater than the frame of thechronometer, thereby projecting beyond the same, and around the saidprojection the plates a are radially arranged.

The plates a, forming stationary electrodes, consist of any suitableclectro-conducting materialsuch as brass, copper, &c.--with twelveSerial No. 195,032. (No model.)

of them placed on a line radially with each character of thechronometer, with three others intervening between each two of thetwelve. thereby dividing the board B in to twelve equal parts, which aresubdivided into four, each representing the one-fourth of an hour. Theseplates are provided with one, two, or more holes, I), in which areinserted the switchplugs F, and a pin, 0, that projects sufliciently farto come in contact with the pawl d on the arm 0, attached to the arborD.

The arm 0, forming a traveling electrode, is arranged between the faceof the switchboard B and the rear of the chronometer, and attached tothe arbor D in such a manner that it is always in line to coincide withthe hourhand, thereby rotating in unison with the same. To the end ofthe arm 0 is pivoted a universal pawl, (I, provided with two rightanglearms, cl, which are attached to one end of the spring 0, the other endof the said spring 0 being attached to the arm 0 at 0, thus permittingthe arm 0 to bring the pawl (Z in contact with the pin 0 as it rotates,and to pass thereby in either direction, and also to hold the pawl andpin in contact several moments, which closes the circuit during thatperiod and continuously rings the bell in the circuit likewise.

The retaining-plug board E is located in close proximity to thechronometer, prefer" ably below the same, and is provided with the holesf, in which the switch-plugs F are placed when not in communication withthe plates a. To the upper part of the board E is arranged thegeneral-call plate which is connected to the main circuit by the wire 9,the function of the said plate and connection being to communicate withthe guests chamber independent of the chronometer by placing one of theplugs F in contact therewith, which completes the circuit by way of theground E and wires G, I, H, and L, which are used in case the guest doesnot promptly respond to the automatic call by signaling through theordinary annunciator.

The switch-plugs F are constructed to fit one in the other by having theend of their shank of a size to coincide with the hole 71, formed in thetop of each slug, the same being devised to permit several calls to bemade at the same time, which may be multiplied as desired, and in casean exceptionally large number of calls are to be made the second row ofholes, I), in the plates at can be utilized. To the said pins aresecured one end of the insulated flexible conductors I, with their otherend attached to the wires H at the retainingplug board E, which permitsthe pins F to be moved to and from the plates at on the board B.

As shown in Fig. 2, the plan is complete with one room, and as all theother room-connections are the same a duplication is unnecessary. In thesaid view the letter P designates the battery located in the line-wireG, which runs and is eonnectedwith the metallic works of thechronometer, thereby conveying the current to the arm through the same,from which it passes to the plates (1, when they are connected to theconductor I, which leads through the retaining-plug board E to theroom-wire H, that connects with the bell p, and runs to the ground E byway of the wire L, and as one side of the battery-wire is also connectedto the ground the circuit is complete when the arm 0 places the pawl din contact with the pin 0 on the plate a, which is connected with room 1by the flexible conductor, thus ringing the bell p in room 1 as long asthe pawl d and pin a are in contact.

To the wire G is connected the bell Z, which when the circuit is maderings, thereby notifying the attendant in the office that a guest isbeing called, so that he may look for the return-signal through theordinary annuneiator.

The operation is as follows: Supposing the guest of room No. 1 Wishes tobe called at twelve oclock, the plug of that number is removed from theboard E and placed in one of the holes I) in the plate a, as shown inFig. 2, that is in line with 12 011 the face of the chronometer. Thenwhen the arm 0, movingin unisonwith the hour-hand, places the pawl d incontact with the pin 0, the electro-cireuit is made through the wires G,I, H, and L,which operates the bell p in the room and wakens the guest,who signals through the annunciator that he has received the call. Incase the guest does not respond the attendant removes the plug and callsagain by placing it against the plate g,which also rings the bell p,which if not answered indicates that the guest requires personalattention. In case the call is to be made at one-quarter, one half, orthreequarters of the hour, the plugs are placed in the hole I) of theintervening plates.

As here shown, the switchboard is arranged to call the hours andquarters thereof; but by placing a larger number of the interveningplates at the call can be made at any fraction of the hour.

It is obvious that the pawl d and pins cmay be dispensed with, and theordinary sliding contact used instead thereof, as illustrated in Figs.5, 6, and 7 ,wherein the arm 0 terminates in the bent form 3 Fig. 6, andin its movement makes contact by friction with the plates at, theexposed surface of the switch-plate a being curved, as represented inFig. 7, to permit the passage of the arm 0; but we prefer the pawl, asthe friction is less.

Having described our invention, what we claim, and wish to secure byUnited States Letters Patent, is'

1. In an electro-circuit, the combination of a chronometer, A, with itscenter arbor extended rearward, the arm 0, provided with the pawl d, theswitch-plates a, provided with the contact-pins c, and mounted upon someinsulating 1naterial,]3, the switch-plugs F, and the bell p, for thepurpose set forth.

2. In an electro-circuit, the combination of a chronometer, A, with itscenter arbor extended rearward, the arm 0, the switchplates a, mountedupon some insulating material, B, the switch-plugs F,and the bellp, forthe purpose set forth.

3. In an electro -circuit,* the combination of a chronometer, A, withits center arbor extended, the arm 0, the switch-plates a, provided withthe contact-pins c, and mounted upon some insulating material, B, theswitchplugs F, and'the bell p, for the purpose set forth.

4. In an electro-eireuit, the combination of a chronometer, A, providedwith a traveling electrode, the plates a, mounted upon some in. sulatingmaterial, the switch-plugs F, provided with a pocket or opening, h, forthe purpose of piling the said plugs and dividing the electric current,and the hell 1), for the purpose set forth.

5. In an electro circuit, the combination of a chronometer, A, with'itscenter arbor extended rearward, the arm 0, arranged to engage with theplates (6, the plates (6 radially arranged around the chronometer A andprovided with the plug-holes b for the plugs F, and the call-bell p, forthe purpose set forth.

In testimony whereof we affix our signatures I I0 in presence of twowitnesses.

. WVILLIAM L. BAILIE.

GEORGE H. MILLS.

Vitnesses:

G. A. BoYDEN, J NO. T. MADDoX.

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